Traffic Wales - the Welsh Assembly Government's Traffic Management and Information Service

Llywodraeth Cynulliad Cymru / Welsh Assembly Government Traffic Wales is the Welsh Assembly Government's traffic information service.

Critical Traffic Alerts

M4: J28 Tredegar Park to J24 Coldra: Both directions: Closed due to roadworks: 1/09/10 - 04/09/10: 20:00-06:00: Local diversions in place

M4 : J25 Caerleon to J29 Castleton : Westbound : Long Delays Due To Accident :

A55 : J26 St Asaph Business Park to J28 Waen / Rhuallt : Both directions : Roadworks : Delays Possible :

A487 : Machynlleth : Dyfi Bridge : Both Directions : Temporary Traffic Lights : Closed to HGVs and large vehicles : Until further notice

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Before the M4 Severn Bridge was built, there was no road bridge over the Severn river south of Gloucester. This meant that traffic from South Wales to South West England had to take the A40, the A4 and then a ferry or a motorail crossing at Bristol.

Traffic Wales manages and provides information for the M4 starting at junction 22 and finishing at junction 49 as well as number of major trunk roads throughout Wales.